Airmar P50, P72, P74, P78, P155M Puck Type & Trolling Motor Owner's manual

Type
Owner's manual
OWNER S GUIDE & INSTALLATION INSTRUCTIONS
17-010 rev.15 06/07/18
In-Hull & Trolling Motor: Puck
Depth Transducer
Models: P50, P72, P74, P78
Chirp Model: P155M
Patent http://www.airmar.com/patent.html
In-Hull Mount
Tools & Materials
Safety glasses
Dust mask
Ear protection
Duct tape
Pole
Detergent (some installations)
Weak solvent (such as alcohol)
Disk sander (some installations)
Thin sealable plastic bags (some installations)
Cable ties
Water-based lubricant (such as K-Y
®
jelly) (some installations)
Adhesive (see “Selecting the Adhesive” below)
Paper cup (some installations)
Stirrer (some installations)
Sand (some installations)
Grommet(s) (some installations)
Installation in a cored fiberglass hull (see page 4):
Electric drill
Hole saw 78mm or 3"
Miniature disk sander (such as Dremel
® rotary sander)
Repair epoxy (such as Pettit Flexpoxy 7076)
Selecting the Adhesive
CAUTION: Do not use:
“5 minute” epoxies because they are too brittle.
RTV (silicone) adhesives because they absorb most of the
sound energy.
A hard adhesive transmit sound best. However, winter
temperature extremes and flexing on trailer rollers can cause it to
de-laminate. Soft adhesives absorb too much sound, so they will
greatly reduce performance. To compromise, use a viscous slow-
cure epoxy or a fairly rigid one-part adhesive sealant.
Fiberglass hull—Use the 2-part epoxy adhesive supplied.
NOTE: In cold climates, a one-part polyurethane adhesive,
such as Boat-Life’s Life Seal
®
, may be best.
Record the information found on the cable tag for future reference.
Part No._________________Date___________Frequency________kHz
Follow the precautions below for optimal
product performance and to reduce the risk of
property damage, personal injury, and/or death.
WARNING: Always wear safety glasses, a dust mask,
and ear protection when installing.
CAUTION: Chose the transducer designed for your
boat’s deadrise angle. Never use adhesive to fill gaps
between the transducer and the hull since this will
greatly reduce the transducer’s performance.
CAUTION: Fiberglass hull—The hull must be SOLID
fiberglass under the transducer. The transducer will
not transmit through coring material such as foam or
balsa wood.
CAUTION: Chirp transducer—Do not install in the
engine compartment or other hot place. The
transducer may fail if it overheats.
CAUTION: Never pull, carry, or hold the transducer by
the cable. This may sever internal connections.
CAUTION: Do not use adhesive to fill gaps between
the transducer and the hull since this will greatly
reduce the transducer’s performance.
CAUTION: Never use solvents. Cleaner, fuel, sealant,
paint, and other products may contain solvents that can
damage plastic parts, especially the transducer’s face.
IMPORTANT: Please read the instructions completely
before proceeding with the installation. These
instructions supersede any other instructions in your
instrument manual if they differ.
P72
P50, P155M
P78
Applications
For fiberglass hulls only
Recommended for high-speed boats
P72 and P74 can be mounted on a trolling motor
P50, P72, P74 and P155M accommodate a deadrise angle of
10
or less
P78 accommodates a deadrise angle of 10
– 22
P74
Outboard powerboats—Install as far aft as is practical.
Inboard/outboard powerboats—Install close to the engine(s).
Inboard powerboats—Install forward of the propeller(s) and shaft(s).
Sailboats—Install on or near the centerline and forward of any
fin keel 300 - 600mm (1 - 2').
Testing the Selected Mounting Location
Establishing a Performance Baseline
The results of this test are used as a basis of comparison to
determine the best in-hull location for the transducer.
1. Take the boat to the maximum depth in which you will be
operating the echosounder. If deep water is not available, find a
location with at least 15m (50').
2. Connect the transducer to the echosounder.
3. Tape the transducer to a pole, cable side up. Do not tape over
the active face. Hold the transducer over the side of the boat
with the active face fully submerged and parallel to the water
surface (Figure 2).
4. Observe the echosounder’s performance and the gain setting
required to obtain a reading on the display. Record the depth
reading.
Testing the Location
While the boat is at the same site (depth of water), test the
transducer inside the hull at the mounting location. Use one of the
test methods below.
A.For a location near the stern and a minimal deadrise angle
Clean away any build-up of grease and/or dirt with detergent or
alcohol. Place the transducer against the hull and allow bilge
water to cover the surface where they touch (Figure 3A).
B.For a moderate deadrise angle—If the hull surface is not
smooth, grind it with a disc sander. Place the transducer inside a
thin plastic bag. Partially fill the bag with water and close it tightly
with a cable tie. Wet the surface of the hull and press the active
face of the transducer against it through the bag (Figure 3B).
C.For any location—If the hull surface is not smooth, grind it with a
disc sander. Coat the face of the transducer with a water-based
lubricant (such as K-Y
® jelly). With a twisting motion, press the
face against the hull (Figure 3C) After testing, wipe all traces of
the lubricant from the transducer’s face.
2
Figure 1. Selecting the mounting location
Outboard Inboard/outboard
Inboard Sailboat
Copyright © 2005 Airmar Technology Corp.
Mounting Location
About Fiberglass Hulls
The fiberglass hull below the transducer must be solid. Since the
hull absorbs acoustic energy, transmitting through the hull
reduces the transducer’s performance. Fiberglass hulls are often
reinforced in places for added strength or to reduce weight. These
cored areas contain balsa wood or structural foam which are poor
sound conductors. Do not locate the transducer over coring.
Placement
CAUTION: Do not mount the transducer in line with or near water
intake or discharge openings or behind strakes, fittings, or hull
irregularities that will disturb the water flow.
Choose a location:
Where the fiberglass is SOLID (no air bubbles are trapped in
the fiberglass resin) and where no coring, flotation material, or
dead air space is sandwiched between the inside skin and outer
skin of the hull.
Where the hull below the transducer will be in contact with the
water at all times.
Where the water flowing under the hull is smoothest with a
minimum of bubbles and turbulence (especially at high speeds).
Away from interference caused by power and radiation sources
such as: the propeller(s) and shaft(s), other machinery, other
echosounders, and other cables. The lower the noise level, the
higher the echosounder gain setting that can be used.
Where the transducer beam will not be blocked by the keel or
propeller shaft(s).
Where there is adequate space inside the vessel to install.
Chirp transducer—Mount in a cool well-ventilated area away
from the engine to avoid overheating.
Boat Type (Figure 1)
Consult the boat manufacturer for the best transducer placement.
If this information is unavailable, follow the guidelines below.
When possible, mount on the side of the hull where the propeller
blades are moving downward.
Figure 2. Establishing a performance baseline
cable
pole
active face
Copyright © 2005 Airmar Technology Corp.
Figure 3. Testing at the selected location
ABC
Copyright © 2005 Airmar Technology Corp.
Observe the echosounder’s performance and compare it to the
baseline. Look for a stable depth reading that is similar to the
baseline. Compare the thickness and intensity of the bottom trace.
If the performance is close to the baseline, this is a good mounting
location. Remember, energy is lost transmitting through the hull. If
the test reading differs markedly from the baseline, you will need
to find another location to install the transducer.
NOTE: Fiberglass hull—If there is no reading or it is erratic, the
transducer may be positioned over coring that is absorbing the
acoustic energy. Choose another location. If no other spot is
available, check with the boat manufacturer to be certain coring is
present before proceeding with the instructions for “Installation in
a Cored Fiberglass Hull” (page 4).
Installation
Cored fiberglass hull—Follow separate instructions on page 4.
CAUTION: Epoxy adhesive—Do not proceed if the hull
temperature is below 15 C (60F) because the cure time of the
epoxy adhesive will be greatly extended.
1. The hull surface to be bonded must be flat, smooth, and free of
paint or any other finish. If the surface is rough, use a disk
sander to smooth an area 10cm (4") in diameter.
2. To ensure a tight bond, remove any dust, grease, or oil from the
hull surface and the bottom of the transducer with detergent or
a weak solvent such as alcohol. Dry both the selected area and
the transducer.
3. Apply the recommended adhesive to the center of the
transducer’s active face—the flat side opposite the cable.
Fiberglass hull—If you are using a 2-part epoxy adhesive, be
sure the hull temperature is above 15
C (60 F). Mix the epoxy
until the color is uniform.
4. Press the transducer face onto the hull with a twisting motion to
expel all air bubbles. Do not use adhesive to fill gaps (Figure
4, 5, or 6). (If the hull is slanted, temporarily secure the
transducer in place with duct tape.) The adhesive supplied by
Airmar is cured in 24 hours at 21
C (70F). The lower the
temperature the longer the cure time.
Cable Routing & Connecting
CAUTION: If the transducer came with a connector, do not
remove it to ease cable routing. If the cable must be cut and
spliced, use Airmar’s splash-proof Junction Box No. 33-035 and
follow the instructions supplied. Removing the water-proof
connector or cutting the cable, except when using a water-tight
junction box, will void the transducer warranty.
1. Route the cable to the echosounder being careful not to tear the
cable jacket when passing it through the bulkhead(s) and other
parts of the boat. Use grommet(s) to prevent chafing. To reduce
electrical interference, separate the transducer cable from other
electrical wiring and the engine(s). Coil any excess cable and
secure it in place with cable ties to prevent damage.
2. Refer to your echosounder owner’s manual to connect the
transducer to the instrument.
Installation in a Cored Fiberglass Hull
Installation in a cored hull is difficult. The objective is to bond the
transducer to the inside surface of the hull’s outer skin while
preventing any moisture from penetrating the core.
CAUTION: There is no way to determine if the outer skin is solid
(no trapped air bubbles in the fiberglass resin) at the selected
location before cutting the inner skin.
CAUTION: Do not proceed if the hull temperature is below 15
C
(60
F) because the cure time of the epoxy will be greatly extended.
3
1. Using a 78mm or 3" hole saw, cut through the inner skin and the
core at the selected location (Figure 7). The core material can be
very soft. Apply only light pressure to the hole saw after cutting
through the inner skin to avoid accidentally cutting the outer skin.
2. Remove the plug of core material so the inner core of the hull is
fully exposed. Sand the inside surface of the outer skin using a
miniature disk sander (Dremel
®
rotary tool). Slightly undercut
the surrounding coring if possible.
Figure 4. Deadrise angle of 10 or less
P78 P50, P72, P74, P155M
NO
Do not use adhesive
to fill gaps.
NO
YES
Copyright © 2005 - 2016 Airmar Technology Corp.
YES NOYES
76 mm (3")
flat area
P78
Figure 5. Deadrise angle from 10 –22and flat centerline
P50, P72, P74, P155M
Copyright © 2005 - 2016 Airmar Technology Corp.
angle too
steep
NOYES
P50, P72, P74, P155M
P78
Do not use
Figure 6. Sailboat with fin keel & deadrise angle from 10–22
adhesive to
fill gaps.
Copyright © 2005 - 2016 Airmar Technology Corp.
Figure 7. Installation in a cored fiberglass hull (P50 shown)
inner skin
core
outer skin
fill with
repair
epoxy
78mm (3")
epoxy
hull thickness
Copyright © 2005 - 2016 Airmar Technology Corp.
3. Clean and dry both the inside surface of the outer skin and the
face of the transducer with detergent or alcohol to remove any
dust, grease, or oil.
4. Pour the epoxy adhesive into the cavity to a depth of 6mm
(1/4") and immediately set the transducer in place with a
firm twisting motion to expel all air bubbles. Do not use
adhesive to fill gaps.
2-Part epoxy adhesive—Being sure the hull temperature is
above 15
C (60 F), mix the epoxy until the color is uniform.
5. Use about a half cup of repair epoxy following the
manufacturer’s directions. Fill the cavity around the transducer.
Avoid trapping air in the mixture. Permit the repair epoxy to set
for at least 1 hour. If the cavity is at an angle, as is usual, tape
over the lower portion of the cavity. Add more epoxy and until
the cavity is filled flush with the top of the inner skin. If the
transducer is covered with repair epoxy, be sure the cable is
bonded tightly so that no water seeps into the core.
6. You may grind the surface smooth, if necessary, but do not
damage the cable.
7. If there is doubt as to the strength of the area, apply layers of
fiberglass overall to a satisfactory thickness. Be sure bilge
water cannot enter the core at the cable.
Trolling Motor Mount: P72, P74
Applications
Electric trolling motor with diameter from 7795mm (33-3/4")
Can be adapted for use with smaller or larger motor cases
Tools & Materials
Safety goggles
Band clamp (some installations)
Cable ties
Mounting Location
Locate the transducer under the motor case (Figure 8).
NOTE: If the motor has a strut that shades the transducer, it will
not significantly reduce the transducer’s performance.
support tube
band clamp
transducer
cable
cable ties
Installation
Small motor case [64mm (2-1/2")]: Do not to over tighten the
band clamp causing the tabs on the transducer housing to break.
Large motor case [102mm (4")]: Purchase a larger stainless steel
band clamp in the plumbing supply section of most hardware stores.
1. Loosen the screw in the band clamp so that one end of the band
is free.
2. Wrap the band clamp around the motor case. Tighten the screw.
Cable Routing
CAUTION: Do not put tension to the cable as it exits the
transducer, as excessive force can break internal connections.
CAUTION: On bow mounted motors, be sure the cable route does
not result in pinching the cable when the motor is in the UP position.
1. Route the cable around the side of the motor case and along the
support tube (Figure 8).
2. Secure the cable to the support tube with cable ties.
3. Route the cable to the echosounder being careful not to tear the
cable jacket. To reduce electrical interference, separate the
transducer cable from other electrical wiring.
4. To prevent damage, coil any excess cable and secure it in
place with cable ties.
Maintenance & Repair
Cleaning
Keep the transducer free of marine growth and petroleum residue.
To clean use a soft cloth and mild household detergent.
Damaged Cable Jacket
1. Should the outer jacket of the cable be abraded or cut, check
that the internal conductors are not damaged.
2. If the conductors are damage free, allow the cable to dry and fill
the damaged area with sealant.
3. Cover the damaged area with electrical tape.
Severed Cable
1. Slide heat-shrink tubing onto the cable.
2. Splice each pair of matching colored conductors with rosin core
solder.
3. Wrap each conductor with insulating tape at the splice.
4. Splice the shield (braided) wire with solder.
5. Fill the spliced area in the cable with sealant.
6. Cover the damaged area with the heat-shrink tubing and follow
the manufacturer’s directions for its use.
NOTE: If the instrument fails to provide a reading, the problem
may not be the damaged cable; the transducer, connector or
instrument could be defective.
Transducer Replacement
The information needed to order a replacement Airmar transducer is
printed on the cable tag. Do not remove this tag. When ordering, specify
the part number, date, and frequency in kHz. For con-venient reference,
record this information at the top of page one.
Obtain parts from your instrument manufacturer or marine dealer.
Gemeco
USA
Tel: 803-693-0777
Airmar EMEA
Europe, Middle East, Africa
Tel: +33.(0)2.23.52.06.48
Figure 8. Location and installation
Copyright © 1998 Airmar Technology Corp.
4
Copyright © 2004 - 2018 Airmar Technology Corp. All rights reserved.
35 Meadowbrook Drive, Milford, New Hampshire 03055-4613, USA
www.airmar.com
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Airmar P50, P72, P74, P78, P155M Puck Type & Trolling Motor Owner's manual

Type
Owner's manual

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